man firejail

FIREJAIL(1)                   firejail man page                   FIREJAIL(1)

NAME
       Firejail - Linux namespaces sandbox program

SYNOPSIS
       Start a sandbox:

              firejail [OPTIONS] [program and arguments]

       File transfer from an existing sandbox

              firejail {--ls | --get | --put} dir_or_filename

       Network traffic shaping for an existing sandbox:

              firejail --bandwidth={name|pid} bandwidth-command

       Monitoring:

              firejail {--list | --netstats | --top | --tree}

       Miscellaneous:

              firejail {-? | --debug-caps | --debug-errnos | --debug-syscalls
              | --debug-protocols | --help | --version}

DESCRIPTION
       Firejail is a SUID sandbox program that reduces the risk  of  security
       breaches  by restricting the running environment of untrusted applica‐
       tions using Linux namespaces, seccomp-bpf and Linux capabilities.   It
       allows  a  process  and  all its descendants to have their own private
       view of the globally shared kernel  resources,  such  as  the  network
       stack,  process table, mount table.  Firejail can work in a SELinux or
       AppArmor environment, and it is integrated with Linux Control Groups.

       Written in C with virtually no dependencies, the software runs on  any
       Linux computer with a 3.x kernel version or newer.  It can sandbox any
       type of processes: servers,  graphical  applications,  and  even  user
       login sessions.

       Firejail allows the user to manage application security using security
       profiles.  Each profile defines a set of permissions  for  a  specific
       application  or  group of applications. The software includes security
       profiles for a number of more common Linux programs, such  as  Mozilla
       Firefox, Chromium, VLC, Transmission etc.

USAGE
       Without  any  options, the sandbox consists of a filesystem build in a
       new mount namespace, and new PID and UTS namespaces. IPC, network  and
       user  namespaces  can  be  added  using  the command line options. The
       default Firejail filesystem is based on the host filesystem  with  the
       main system directories mounted read-only. These directories are /etc,
       /var, /usr, /bin, /sbin, /lib, /lib32, /libx32 and /lib64. Only  /home
       and /tmp are writable.

       As  it  starts  up, Firejail tries to find a security profile based on
       the name of the application.  If an appropriate profile is not  found,
       Firejail  will  use  a  default profile.  The default profile is quite
       restrictive. In case the application  doesn't  work,  use  --noprofile
       option  to  disable it. For more information, please see SECURITY PRO‐
       FILES section below.

       If a program argument is  not  specified,  Firejail  starts  /bin/bash
       shell.  Examples:

       $ firejail [OPTIONS]                # starting a /bin/bash shell

       $ firejail [OPTIONS] firefox        # starting Mozilla Firefox

       # sudo firejail [OPTIONS] /etc/init.d/nginx start

OPTIONS
       --     Signal  the end of options and disables further option process‐
              ing.

       --allow-debuggers
              Allow tools such as  strace  and  gdb  inside  the  sandbox  by
              whitelisting  system  calls  ptrace  and process_vm_readv. This
              option is only available when running on Linux kernels  4.8  or
              newer - a kernel bug in ptrace system call allows a full bypass
              of the seccomp filter.

              Example:
              $  firejail   --allow-debuggers   --profile=/etc/firejail/fire‐
              fox.profile strace -f firefox

       --allusers
              All  directories under /home are visible inside the sandbox. By
              default, only current user home directory is visible.

              Example:
              $ firejail --allusers

       --apparmor
              Enable AppArmor confinement. For more information,  please  see
              APPARMOR section below.

       --appimage
              Sandbox an AppImage (https://appimage.org/) application. If the
              sandbox is started as a regular user, default seccomp and capa‐
              bilities filters are enabled.

              Example:
              $ firejail --appimage krita-3.0-x86_64.appimage
              $ firejail --appimage --private krita-3.0-x86_64.appimage
              $  firejail --appimage --net=none --x11 krita-3.0-x86_64.appim‐
              age

       --apparmor.print=name|pid
              Print the AppArmor confinement status for the  sandbox  identi‐
              fied by name or by PID.

              Example:
              $ firejail --apparmor.print=browser
              5074:netblue:/usr/bin/firejail /usr/bin/firefox-esr
                AppArmor: firejail-default enforce

       --audit
              Audit the sandbox, see AUDIT section for more details.

       --audit=test-program
              Audit the sandbox, see AUDIT section for more details.

       --bandwidth=name|pid
              Set bandwidth limits for the sandbox identified by name or PID,
              see TRAFFIC SHAPING section for more details.

       --bind=filename1,filename2
              Mount-bind filename1 on top of filename2. This option  is  only
              available when running as root.

              Example:
              # firejail --bind=/config/etc/passwd,/etc/passwd

       --blacklist=dirname_or_filename
              Blacklist  directory  or  file. File globbing is supported, see
              FILE GLOBBING section for more details.

              Example:
              $ firejail --blacklist=/sbin --blacklist=/usr/sbin
              $ firejail --blacklist=~/.mozilla
              $ firejail "--blacklist=/home/username/My Virtual Machines"
              $ firejail --blacklist=/home/username/My\ Virtual\ Machines

       --build
              The command  builds  a  whitelisted  profile.  The  profile  is
              printed  on  the screen. If /usr/bin/strace is installed on the
              system, it also builds a whitelisted seccomp profile. The  pro‐
              gram   is   run   in   a   very   relaxed  sandbox,  with  only
              --caps.drop=all and  --nonewprivs.  Programs  that  raise  user
              privileges  are  not supported in order to allow strace to run.
              Chromium and Chromium-based browsers will not work.

              Example:
              $ firejail --build vlc ~/Videos/test.mp4

       --build=profile-file
              The command builds a whitelisted profile, and saves it in  pro‐
              file-file.  If  /usr/bin/strace  is installed on the system, it
              also builds a whitelisted seccomp profile. The program  is  run
              in  a  very  relaxed  sandbox,  with  only  --caps.drop=all and
              --nonewprivs. Programs that raise user privileges are not  sup‐
              ported  in order to allow strace to run. Chromium and Chromium-
              based browsers will not work.

              Example:
              $ firejail --build=vlc.profile vlc ~/Videos/test.mp4

       -c     Execute command and exit.

       --caps Linux capabilities is a kernel feature designed to split up the
              root privilege into a set of distinct privileges.  These privi‐
              leges can be enabled or disabled independently, thus  restrict‐
              ing what a process running as root can do in the system.

              By  default  root  programs  run with all capabilities enabled.
              --caps option disables the following capabilities: CAP_SYS_MOD‐
              ULE,       CAP_SYS_RAWIO,      CAP_SYS_BOOT,      CAP_SYS_NICE,
              CAP_SYS_TTY_CONFIG, CAP_SYSLOG, CAP_MKNOD, CAP_SYS_ADMIN.   The
              filter is applied to all processes started in the sandbox.

              Example:
              $ sudo firejail --caps /etc/init.d/nginx start

       --caps.drop=all
              Drop all capabilities for the processes running in the sandbox.
              This option is recommended for  running  GUI  programs  or  any
              other  program  that  doesn't  require root privileges. It is a
              must-have option for sandboxing  untrusted  programs  installed
              from unofficial sources - such as games, Java programs, etc.

              Example:
              $ firejail --caps.drop=all warzone2100

       --caps.drop=capability,capability,capability
              Define a custom blacklist Linux capabilities filter.

              Example:
              $ firejail --caps.drop=net_broadcast,net_admin,net_raw

       --caps.keep=capability,capability,capability
              Define a custom whitelist Linux capabilities filter.

              Example:
              $   sudo  firejail  --caps.keep=chown,net_bind_service,setgid,\
              setuid /etc/init.d/nginx start

       --caps.print=name|pid
              Print the caps filter for the sandbox identified by name or  by
              PID.

              Example:
              $ firejail --name=mygame --caps.drop=all warzone2100 &
              $ firejail --caps.print=mygame

              Example:
              $ firejail --list
              3272:netblue::firejail --private firefox
              $ firejail --caps.print=3272

       --cgroup=tasks-file
              Place the sandbox in the specified control group. tasks-file is
              the full path of cgroup tasks file.

              Example:
              # firejail --cgroup=/sys/fs/cgroup/g1/tasks

       --chroot=dirname
              Chroot the sandbox into a root filesystem. Unlike  the  regular
              filesystem  container, the system directories are mounted read-
              write. If the sandbox is started as  a  regular  user,  default
              seccomp and capabilities filters are enabled.

              Example:
              $ firejail --chroot=/media/ubuntu warzone2100

       --cpu=cpu-number,cpu-number,cpu-number
              Set CPU affinity.

              Example:
              $ firejail --cpu=0,1 handbrake

       --cpu.print=name|pid
              Print the CPU cores in use by the sandbox identified by name or
              by PID.

              Example:
              $ firejail --name=mygame --caps.drop=all warzone2100 &
              $ firejail --cpu.print=mygame

              Example:
              $ firejail --list
              3272:netblue::firejail --private firefox
              $ firejail --cpu.print=3272

       --debug
              Print debug messages.

              Example:
              $ firejail --debug firefox

       --debug-blacklists
              Debug blacklisting.

              Example:
              $ firejail --debug-blacklists firefox

       --debug-caps
              Print all recognized capabilities in the current Firejail soft‐
              ware build and exit.

              Example:
              $ firejail --debug-caps

       --debug-errnos
              Print  all  recognized  error  numbers  in the current Firejail
              software build and exit.

              Example:
              $ firejail --debug-errnos

       --debug-private-lib
              Debug messages for --private-lib option.

       --debug-protocols
              Print all recognized protocols in the current Firejail software
              build and exit.

              Example:
              $ firejail --debug-protocols

       --debug-syscalls
              Print all recognized system calls in the current Firejail soft‐
              ware build and exit.

              Example:
              $ firejail --debug-syscalls

       --debug-whitelists
              Debug whitelisting.

              Example:
              $ firejail --debug-whitelists firefox

       --defaultgw=address
              Use this address as default gateway in the new  network  names‐
              pace.

              Example:
              $ firejail --net=eth0 --defaultgw=10.10.20.1 firefox

       --disable-mnt
              Disable /mnt, /media, /run/mount and /run/media access.

              Example:
              $ firejail --disable-mnt firefox

       --dns=address
              Set  a  DNS server for the sandbox. Up to three DNS servers can
              be defined.  Use this option if you don't trust the  DNS  setup
              on your network.

              Example:
              $ firejail --dns=8.8.8.8 --dns=8.8.4.4 firefox

              Note: this feature is not supported on systemd-resolved setups.

       --dns.print=name|pid
              Print  DNS configuration for a sandbox identified by name or by
              PID.

              Example:
              $ firejail --name=mygame --caps.drop=all warzone2100 &
              $ firejail --dns.print=mygame

              Example:
              $ firejail --list
              3272:netblue::firejail --private firefox
              $ firejail --dns.print=3272

       --env=name=value
              Set environment variable in the new sandbox.

              Example:
              $ firejail --env=LD_LIBRARY_PATH=/opt/test/lib

       --fs.print=name|pid
              Print the filesystem log for the sandbox identified by name  or
              by PID.

              Example:
              $ firejail --name=mygame --caps.drop=all warzone2100 &
              $ firejail --fs.print=mygame

              Example:
              $ firejail --list
              3272:netblue::firejail --private firefox
              $ firejail --fs.print=3272

       --get=name|pid filename
              Get  a  file  from sandbox container, see FILE TRANSFER section
              for more details.

       -?, --help
              Print options end exit.

       --hostname=name
              Set sandbox hostname.

              Example:
              $ firejail --hostname=officepc firefox

       --hosts-file=file
              Use file as /etc/hosts.

              Example:
              $ firejail --hosts-file=~/myhosts firefox

       --ignore=command
              Ignore command in profile file.

              Example:
              $ firejail --ignore=shell --ignore=seccomp firefox
              $ firejail --ignore="net eth0" firefox

       --interface=interface
              Move interface in a new network namespace. Up to four  --inter‐
              face options can be specified.  Note: wlan devices are not sup‐
              ported for this option.

              Example:
              $ firejail --interface=eth1 --interface=eth0.vlan100

       --ip=address
              Assign IP addresses to the last network interface defined by  a
              --net option. A default gateway is assigned by default.

              Example:
              $ firejail --net=eth0 --ip=10.10.20.56 firefox

       --ip=none
              No  IP  address  and  no default gateway are configured for the
              last interface defined by a --net option. Use  this  option  in
              case  you  intend to start an external DHCP client in the sand‐
              box.

              Example:
              $ firejail --net=eth0 --ip=none

              If the corresponding interface doesn't have an IP address  con‐
              figured, this option is enabled by default.

       --ip6=address
              Assign  IPv6 addresses to the last network interface defined by
              a --net option.

              Example:
              $ firejail --net=eth0 --ip6=2001:0db8:0:f101::1/64 firefox

              Note: you don't need this option if you obtain your ip6 address
              from  router via SLAAC (your ip6 address and default route will
              be configured by kernel automatically).

       --iprange=address,address
              Assign an IP address in the provided range to the last  network
              interface  defined  by  a  --net  option.  A default gateway is
              assigned by default.

              Example:
              $ firejail --net=eth0 --iprange=192.168.1.100,192.168.1.150

       --ipc-namespace
              Enable  a new IPC namespace if the sandbox  was  started  as  a
              regular user. IPC namespace is enabled by default for sandboxes
              started as root.

              Example:
              $ firejail --ipc-namespace firefox

       --join=name|pid
              Join the sandbox identified by name or by  PID.  By  default  a
              /bin/bash  shell  is  started  after joining the sandbox.  If a
              program is specified, the program is run  in  the  sandbox.  If
              --join  command  is issued as a regular user, all security fil‐
              ters are configured for the new process the same they are  con‐
              figured  in  the sandbox.  If --join command is issued as root,
              the security filters, cgroups and cpus configurations  are  not
              applied to the process joining the sandbox.

              Example:
              $ firejail --name=mygame --caps.drop=all warzone2100 &
              $ firejail --join=mygame

              Example:
              $ firejail --list
              3272:netblue::firejail --private firefox
              $ firejail --join=3272

       --join-filesystem=name|pid
              Join  the  mount namespace of the sandbox identified by name or
              PID. By default a /bin/bash shell is started after joining  the
              sandbox.   If a program is specified, the program is run in the
              sandbox. This command is available only to root user.  Security
              filters, cgroups and cpus configurations are not applied to the
              process joining the sandbox.

       --join-network=name|pid
              Join the network namespace of the sandbox identified  by  name.
              By default a /bin/bash shell is started after joining the sand‐
              box.  If a program is specified, the  program  is  run  in  the
              sandbox. This command is available only to root user.  Security
              filters, cgroups and cpus configurations are not applied to the
              process joining the sandbox. Example:

              # start firefox
              $ firejail --net=eth0 --name=browser firefox &

              # change netfilter configuration
              $  sudo firejail --join-network=browser bash -c "cat /etc/fire‐
              jail/nolocal.net | /sbin/iptables-restore"

              # verify netfilter configuration
              $ sudo firejail --join-network=browser /sbin/iptables -vL

              # verify  IP addresses
              $ sudo firejail --join-network=browser ip addr
              Switching to pid 1932, the first child process inside the sand‐
              box
              1:  lo:    mtu  65536 qdisc noqueue state
              UNKNOWN group default
                  link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
                  inet 127.0.0.1/8 scope host lo
                     valid_lft forever preferred_lft forever
                  inet6 ::1/128 scope host
                     valid_lft forever preferred_lft forever
              2: eth0-1931:  mtu 1500  qdisc
              noqueue state UNKNOWN group default
                  link/ether 76:58:14:42:78:e4 brd ff:ff:ff:ff:ff:ff
                  inet   192.168.1.158/24   brd  192.168.1.255  scope  global
              eth0-1931
                     valid_lft forever preferred_lft forever
                  inet6 fe80::7458:14ff:fe42:78e4/64 scope link
                     valid_lft forever preferred_lft forever

       --join-or-start=name
              Join the sandbox identified by name or start a new  one.   Same
              as  "firejail  --join=name"  if  sandbox  with  specified  name
              exists, otherwise same as "firejail --name=name ..."
              Note that in contrary to other join options there is respective
              profile option.

       --keep-dev-shm
              /dev/shm directory is untouched (even with --private-dev)

              Example:
              $ firejail --keep-dev-shm --private-dev

       --keep-var-tmp
              /var/tmp directory is untouched.

              Example:
              $ firejail --keep-var-tmp

       --ls=name|pid dir_or_filename
              List  files in sandbox container, see FILE TRANSFER section for
              more details.

       --list List all sandboxes, see MONITORING section for more details.

              Example:
              $ firejail --list
              7015:netblue:browser:firejail firefox
              7056:netblue:torrent:firejail --net=eth0 transmission-gtk
              7064:netblue::firejail --noroot xterm
              $

       --mac=address
              Assign MAC addresses to the last network interface defined by a
              --net  option. This option is not supported for wireless inter‐
              faces.

              Example:
              $ firejail --net=eth0 --mac=00:11:22:33:44:55 firefox

       --machine-id
              Spoof id number in /etc/machine-id file - a new  random  id  is
              generated inside the sandbox.

              Example:
              $ firejail --machine-id

       --memory-deny-write-execute
              Install  a  seccomp  filter  to block attempts to create memory
              mappings that are both writable and executable, to change  map‐
              pings  to be executable, or to create executable shared memory.
              The filter examines the arguments  of  mmap,  mmap2,  mprotect,
              pkey_mprotect  and  shmat system calls and kills the process if
              necessary.

              Note: shmat is not implemented as a system call on  some  plat‐
              forms including i386, and it cannot be handled by seccomp-bpf.

       --mtu=number
              Assign  a  MTU value to the last network interface defined by a
              --net option.

              Example:
              $ firejail --net=eth0 --mtu=1492

       --name=name
              Set sandbox name. Several options, such as --join  and  --shut‐
              down, can use this name to identify a sandbox.

              Example:
              $ firejail --name=mybrowser firefox

       --net=bridge_interface
              Enable  a  new  network namespace and connect it to this bridge
              interface.  Unless specified with option --ip and  --defaultgw,
              an  IP address and a default gateway will be assigned automati‐
              cally to the sandbox. The IP  address  is  verified  using  ARP
              before assignment. The address configured as default gateway is
              the bridge device IP address. Up to four --net options  can  be
              specified.

              Example:
              $ sudo brctl addbr br0
              $ sudo ifconfig br0 10.10.20.1/24
              $ sudo brctl addbr br1
              $ sudo ifconfig br1 10.10.30.1/24
              $ firejail --net=br0 --net=br1

       --net=ethernet_interface|wireless_interface
              Enable  a new network namespace and connect it to this ethernet
              interface  using  the  standard  Linux  macvlan|ipvaln  driver.
              Unless  specified  with  option  --ip  and  --defaultgw,  an IP
              address and a default gateway will be assigned automatically to
              the  sandbox.  The  IP  address  is  verified  using ARP before
              assignment. The address configured as default  gateway  is  the
              default  gateway  of  the host. Up to four --net options can be
              specified.  Support for ipvlan driver was introduced  in  Linux
              kernel 3.19.

              Example:
              $ firejail --net=eth0 --ip=192.168.1.80 --dns=8.8.8.8 firefox
              $ firejail --net=wlan0 firefox

       --net=tap_interface
              Enable  a new network namespace and connect it to this ethernet
              tap interface using the standard Linux macvlan driver.  If  the
              tap  interface  is  not configured, the sandbox will not try to
              configure the interface inside the sandbox.  Please  use  --ip,
              --netmask and --defaultgw to specify the configuration.

              Example:
              $  firejail --net=tap0 --ip=10.10.20.80 --netmask=255.255.255.0
              --defaultgw=10.10.20.1 firefox

       --net=none
              Enable a new, unconnected network namespace. The only interface
              available  in  the  new  namespace  is a new loopback interface
              (lo).  Use this option to deny network access to programs  that
              don't really need network access.

              Example:
              $ firejail --net=none vlc

              Note:  --net=none  can crash the application on some platforms.
              In these cases, it can be replaced with --protocol=unix.

       --netfilter
              Enable a default firewall if a new network namespace is created
              inside  the  sandbox.   This option has no effect for sandboxes
              using the system network namespace.

              The default firewall is optimized for regular desktop  applica‐
              tions. No incoming connections are accepted:

              *filter
              :INPUT DROP [0:0]
              :FORWARD DROP [0:0]
              :OUTPUT ACCEPT [0:0]
              -A INPUT -i lo -j ACCEPT
              -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
              # allow ping
              -A INPUT -p icmp --icmp-type destination-unreachable -j ACCEPT
              -A INPUT -p icmp --icmp-type time-exceeded -j ACCEPT
              -A INPUT -p icmp --icmp-type echo-request -j ACCEPT
              # drop STUN (WebRTC) requests
              -A OUTPUT -p udp --dport 3478 -j DROP
              -A OUTPUT -p udp --dport 3479 -j DROP
              -A OUTPUT -p tcp --dport 3478 -j DROP
              -A OUTPUT -p tcp --dport 3479 -j DROP
              COMMIT

              Example:
              $ firejail --net=eth0 --netfilter firefox

       --netfilter=filename
              Enable  the  firewall  specified  by  filename if a new network
              namespace is created inside the sandbox.  This  option  has  no
              effect for sandboxes using the system network namespace.

              Please  use  the  regular iptables-save/iptables-restore format
              for the filter file. The following examples  are  available  in
              /etc/firejail directory:

              webserver.net  is  a webserver firewall that allows access only
              to TCP ports 80 and 443.  Example:

              $ firejail --netfilter=/etc/firejail/webserver.net --net=eth0 \
              /etc/init.d/apache2 start

              nolocal.net is a desktop client firewall that disable access to
              local network. Example:

              $ firejail --netfilter=/etc/firejail/nolocal.net \
              --net=eth0 firefox

       --netfilter=filename,arg1,arg2,arg3 ...
              This  is  the  template version of the previous command. $ARG1,
              $ARG2, $ARG3 ... in the firewall script are replaced with arg1,
              arg2,  arg3  ... passed on the command line. Up to 16 arguments
              are supported.  Example:

              $ firejail --net=eth0 --ip=192.168.1.105 \
              --netfilter=/etc/firejail/tcpserver.net,5001 server-program

       --netfilter.print=name|pid
              Print the firewall installed in the sandbox specified  by  name
              or PID. Example:

              $ firejail --name=browser --net=eth0 --netfilter firefox &
              $ firejail --netfilter.print=browser

       --netfilter6=filename
              Enable the IPv6 firewall specified by filename if a new network
              namespace is created inside the sandbox.  This  option  has  no
              effect  for  sandboxes  using  the  system  network  namespace.
              Please use the  regular  iptables-save/iptables-restore  format
              for the filter file.

       --netfilter6.print=name|pid
              Print  the  IPv6 firewall installed in the sandbox specified by
              name or PID. Example:

              $ firejail --name=browser --net=eth0 --netfilter firefox &
              $ firejail --netfilter6.print=browser

       --netmask=address
              Use this option when you want to assign an IP address in a  new
              namespace  and  the  parent interface specified by --net is not
              configured. An IP address and a default  gateway  address  also
              have  to be added. By default the new namespace interface comes
              without IP address and default gateway configured. Example:

              $ sudo /sbin/brctl addbr br0
              $ sudo /sbin/ifconfig br0 up
              $     firejail     --ip=10.10.20.67     --netmask=255.255.255.0
              --defaultgw=10.10.20.1

       --netns=name
              Run  the  program  in  a  named,  persistent network namespace.
              These can be created and configured using "ip netns".

       --netstats
              Monitor network namespace statistics,  see  MONITORING  section
              for more details.

              Example:

              $ firejail --netstats
              PID  User    RX(KB/s) TX(KB/s) Command
              1294 netblue 53.355   1.473    firejail --net=eth0 firefox
              7383 netblue 9.045    0.112    firejail --net=eth0 transmission

       --nice=value
              Set  nice  value  for all processes running inside the sandbox.
              Only root may specify a negative value.

              Example:
              $ firejail --nice=2 firefox

       --no3d Disable 3D hardware acceleration.

              Example:
              $ firejail --no3d firefox

       --noblacklist=dirname_or_filename
              Disable blacklist for this directory or file.

              Example:
              $ firejail
              $ nc dict.org 2628
              bash: /bin/nc: Permission denied
              $ exit

              $ firejail --noblacklist=/bin/nc
              $ nc dict.org 2628
              220 pan.alephnull.com dictd 1.12.1/rf on Linux 3.14-1-amd64

       --nodbus
              Disable D-Bus access. Only the regular UNIX socket  is  handled
              by  this command. To disable the abstract socket you would need
              to request a new network namespace using --net command. Another
              option is to remove unix from --protocol set.

              Example:
              $ firejail --nodbus --net=none

       --nodvd
              Disable DVD and audio CD devices.

              Example:
              $ firejail --nodvd

       --noexec=dirname_or_filename
              Remount  directory or file noexec, nodev and nosuid. File glob‐
              bing is supported, see FILE GLOBBING section for more details.

              Example:
              $ firejail --noexec=/tmp

              /etc and /var are noexec by default if the sandbox was  started
              as  a  regular user. If there are more than one mount operation
              on the path of the file or directory, noexec should be  applied
              to  the last one. Always check if the change took effect inside
              the sandbox.

       --nogroups
              Disable supplementary groups. Without this  option,  supplemen‐
              tary  groups are enabled for the user starting the sandbox. For
              root user supplementary groups are always disabled.

              Note: By default all regular user groups are removed  with  the
              exception  of  the  current  user.  This  can  be changed using
              --allusers command option.

              Example:
              $ id
              uid=1000(netblue)      gid=1000(netblue)       groups=1000(net‐
              blue),24(cdrom),25(floppy),27(sudo),29(audio)
              $ firejail --nogroups
              Parent pid 8704, child pid 8705
              Child process initialized
              $ id
              uid=1000(netblue) gid=1000(netblue) groups=1000(netblue)
              $

       --noprofile
              Do not use a security profile.

              Example:
              $ firejail
              Reading profile /etc/firejail/default.profile
              Parent pid 8553, child pid 8554
              Child process initialized
              [...]

              $ firejail --noprofile
              Parent pid 8553, child pid 8554
              Child process initialized
              [...]

       --noroot
              Install a user namespace with a single user - the current user.
              root user does not exist in  the  new  namespace.  This  option
              requires a Linux kernel version 3.8 or newer. The option is not
              supported for --chroot and  --overlay  configurations,  or  for
              sandboxes started as root.

              Example:
              $ firejail --noroot
              Parent pid 8553, child pid 8554
              Child process initialized
              $ ping google.com
              ping: icmp open socket: Operation not permitted
              $

       --nonewprivs
              Sets the NO_NEW_PRIVS prctl.  This ensures that child processes
              cannot acquire new privileges using execve(2);  in  particular,
              this  means  that calling a suid binary (or one with file capa‐
              bilities) does not result in an  increase  of  privilege.  This
              option is enabled by default if seccomp filter is activated.

       --nosound
              Disable sound system.

              Example:
              $ firejail --nosound firefox

       --noautopulse
              Disable automatic ~/.config/pulse init, for complex setups such
              as remote pulse servers or non-standard socket paths.

              Example:
              $ firejail --noautopulse firefox

       --notv Disable DVB (Digital Video Broadcasting) TV devices.

              Example:
              $ firejail --notv vlc

       --nou2f
              Disable U2F devices.

              Example:
              $ firejail --nou2f

       --novideo
              Disable video devices.

       --nowhitelist=dirname_or_filename
              Disable whitelist for this directory or file.

       --output=logfile
              stdout logging and log rotation. Copy stdout  to  logfile,  and
              keep  the size of the file under 500KB using log rotation. Five
              files with prefixes .1 to .5 are used in rotation.

              Example:
              $ firejail --output=sandboxlog /bin/bash
              [...]
              $ ls -l sandboxlog*
              -rw-r--r-- 1 netblue netblue 333890 Jun  2 07:48 sandboxlog
              -rw-r--r-- 1 netblue netblue 511488 Jun  2 07:48 sandboxlog.1
              -rw-r--r-- 1 netblue netblue 511488 Jun  2 07:48 sandboxlog.2
              -rw-r--r-- 1 netblue netblue 511488 Jun  2 07:48 sandboxlog.3
              -rw-r--r-- 1 netblue netblue 511488 Jun  2 07:48 sandboxlog.4
              -rw-r--r-- 1 netblue netblue 511488 Jun  2 07:48 sandboxlog.5

       --output-stderr=logfile
              Similar to --output, but stderr is also stored.

       --overlay
              Mount a filesystem overlay on top of  the  current  filesystem.
              Unlike the regular filesystem container, the system directories
              are mounted read-write. All filesystem  modifications  go  into
              the  overlay.   Directories /run, /tmp and /dev are not covered
              by the overlay. The overlay is stored in  $HOME/.firejail/
              directory.   If  the  sandbox  is  started  as  a regular user,
              default seccomp and capabilities filters are enabled.

              OverlayFS support is required in Linux kernel for  this  option
              to  work.   OverlayFS was officially introduced in Linux kernel
              version 3.18.  This option is not available on Grsecurity  sys‐
              tems.

              Example:
              $ firejail --overlay firefox

       --overlay-named=name
              Mount  a  filesystem  overlay on top of the current filesystem.
              Unlike the regular filesystem container, the system directories
              are  mounted  read-write.  All filesystem modifications go into
              the overlay.  Directories /run, /tmp and /dev are  not  covered
              by the overlay. The overlay is stored in $HOME/.firejail/
              directory.  The created overlay can be reused between  multiple
              sessions.  If the sandbox is started as a regular user, default
              seccomp and capabilities filters are enabled.

              OverlayFS support is required in Linux kernel for  this  option
              to  work.   OverlayFS was officially introduced in Linux kernel
              version 3.18.  This option is not available on Grsecurity  sys‐
              tems.

              Example:
              $ firejail --overlay-named=jail1 firefox

       --overlay-tmpfs
              Mount  a  filesystem  overlay on top of the current filesystem.
              All filesystem modifications are discarded when the sandbox  is
              closed.  Directories /run, /tmp and /dev are not covered by the
              overlay.  If the sandbox is started as a regular user,  default
              seccomp and capabilities filters are enabled.

              OverlayFS  support  is required in Linux kernel for this option
              to work.  OverlayFS was officially introduced in  Linux  kernel
              version  3.18.  This option is not available on Grsecurity sys‐
              tems.

              Example:
              $ firejail --overlay-tmpfs firefox

       --overlay-clean
              Clean all overlays stored in $HOME/.firejail directory.

              Example:
              $ firejail --overlay-clean

       --private
              Mount  new  /root  and  /home/user  directories  in   temporary
              filesystems.  All  modifications are discarded when the sandbox
              is closed.

              Example:
              $ firejail --private firefox

       --private=directory
              Use directory as user home.

              Example:
              $ firejail --private=/home/netblue/firefox-home firefox

       --private-home=file,directory
              Build a new user home in a temporary filesystem, and  copy  the
              files  and directories in the list in the new home. All modifi‐
              cations are discarded when the sandbox is closed.

              Example:
              $ firejail --private-home=.mozilla firefox

       --private-cache
              Mount an empty temporary filesystem on top of the .cache direc‐
              tory  in  user  home.  All modifications are discarded when the
              sandbox is closed.

              Example:
              $ firejail --private-cache openbox

       --private-bin=file,file
              Build a new /bin in a temporary filesystem, and copy  the  pro‐
              grams  in the list.  If no listed file is found, /bin directory
              will be empty.  The same directory is  also  bind-mounted  over
              /sbin,  /usr/bin,  /usr/sbin and /usr/local/bin.  All modifica‐
              tions are discarded when the sandbox is closed.  File  globbing
              is supported, see FILE GLOBBING section for more details.

              Example:
              $ firejail --private-bin=bash,sed,ls,cat
              Parent pid 20841, child pid 20842
              Child process initialized
              $ ls /bin
              bash  cat  ls  sed

       --private-lib=file,directory
              This  feature  is currently under heavy development. Only amd64
              platforms are supported at this moment.  The idea is to build a
              new /lib in a temporary filesystem, with only the library files
              necessary to run the application.  It could be as simple as:

              $ firejail --private-lib galculator

              but it gets complicated really fast:

              $   firejail   --private-lib=x86_64-linux-gnu/xed,x86_64-linux-
              gnu/gdk-pixbuf-2.0,libenchant.so.1,librsvg-2.so.2 xed

              The feature is integrated with --private-bin:

              $ firejail --private-lib --private-bin=bash,ls,ps
              $ ls /lib
              ld-linux-x86-64.so.2  libgpg-error.so.0  libprocps.so.6 libsys‐
              temd.so.0
              libc.so.6 liblz4.so.1 libpthread.so.0 libtinfo.so.5
              libdl.so.2 liblzma.so.5 librt.so.1 x86_64-linux-gnu
              libgcrypt.so.20 libpcre.so.3 libselinux.so.1
              $ ps
               PID TTY          TIME CMD
                  1 pts/0    00:00:00 firejail
                 45 pts/0    00:00:00 bash
                 48 pts/0    00:00:00 ps
              $

       --private-dev
              Create a new /dev directory. Only disc, dri, null, full,  zero,
              tty,  pts,  ptmx,  random,  snd,  urandom,  video,  log and shm
              devices are available.

              Example:
              $ firejail --private-dev
              Parent pid 9887, child pid 9888
              Child process initialized
              $ ls /dev
              cdrom  cdrw  dri  dvd  dvdrw  full  log  null  ptmx  pts   ran‐
              dom  shm  snd  sr0  tty  urandom  zero
              $

       --private-etc=file,directory
              Build  a new /etc in a temporary filesystem, and copy the files
              and directories in the list.  If no listed file is found,  /etc
              directory  will be empty.  All modifications are discarded when
              the sandbox is closed.

              Example:
              $ firejail --private-etc=group,hostname,localtime, \
              nsswitch.conf,passwd,resolv.conf

       --private-opt=file,directory
              Build a new /opt in a temporary filesystem, and copy the  files
              and  directories in the list.  If no listed file is found, /opt
              directory will be empty.  All modifications are discarded  when
              the sandbox is closed.

              Example:
              $ firejail --private-opt=firefox /opt/firefox/firefox

       --private-srv=file,directory
              Build  a new /srv in a temporary filesystem, and copy the files
              and directories in the list.  If no listed file is found,  /srv
              directory  will be empty.  All modifications are discarded when
              the sandbox is closed.

              Example:
              # firejail --private-srv=www /etc/init.d/apache2 start

       --private-tmp
              Mount an empty temporary filesystem on top  of  /tmp  directory
              whitelisting X11 and PulseAudio sockets.

              Example:
              $ firejail --private-tmp
              $ ls -al /tmp
              drwxrwxrwt  4 nobody nogroup   80 Apr 30 11:46 .
              drwxr-xr-x 30 nobody nogroup 4096 Apr 26 22:18 ..
              drwx------   2  nobody  nogroup  4096  Apr  30 10:52 pulse-PKd‐
              htXMmr18n
              drwxrwxrwt  2 nobody nogroup 4096 Apr 30 10:52 .X11-unix

       --profile=filename
              Load a custom security profile from filename. For filename  use
              an  absolute  path or a path relative to the current path.  For
              more information, see SECURITY PROFILES section below.

              Example:
              $ firejail --profile=myprofile

       --profile.print=name|pid
              Print the name of the profile file for the  sandbox  identified
              by name or or PID.

              Example:
              $ firejail --profile.print=browser
              /etc/firejail/firefox.profile

       --protocol=protocol,protocol,protocol
              Enable  protocol  filter.  The  filter  is based on seccomp and
              checks the first argument to socket  system  call.   Recognized
              values:  unix,  inet, inet6, netlink and packet. This option is
              not supported for i386 architecture.

              Example:
              $ firejail --protocol=unix,inet,inet6 firefox

       --protocol.print=name|pid
              Print the protocol filter for the sandbox identified by name or
              PID.

              Example:
              $ firejail --name=mybrowser firefox &
              $ firejail --protocol.print=mybrowser
              unix,inet,inet6,netlink

              Example:
              $ firejail --list
              3272:netblue::firejail --private firefox
              $ firejail --protocol.print=3272
              unix,inet,inet6,netlink

       --put=name|pid src-filename dest-filename
              Put  a file in sandbox container, see FILE TRANSFER section for
              more details.

       --quiet
              Turn off Firejail's output.

       --read-only=dirname_or_filename
              Set directory or file read-only. File  globbing  is  supported,
              see FILE GLOBBING section for more details.

              Example:
              $ firejail --read-only=~/.mozilla firefox

              A  short note about mixing --whitelist and --read-only options.
              Whitelisted directories should be made read-only independently.
              Making   a  parent  directory  read-only,  will  not  make  the
              whitelist read-only. Example:

              $ firejail --whitelist=~/work --read-only=~ --read-only=~/work

       --read-write=dirname_or_filename
              Set directory or file read-write.  Only  files  or  directories
              belonging  to  the current user are allowed for this operation.
              File globbing is supported, see FILE GLOBBING section for  more
              details.  Example:

              $ mkdir ~/test
              $ touch ~/test/a
              $ firejail --read-only=~/test --read-write=~/test/a

       --rlimit-as=number
              Set  the  maximum size of the process's virtual memory (address
              space) in bytes.

       --rlimit-cpu=number
              Set the maximum limit, in seconds, for the amount of  CPU  time
              each sandboxed process  can consume. When the limit is reached,
              the processes are killed.

              The CPU limit is a limit on CPU  seconds  rather  than  elapsed
              time.  CPU  seconds  is  basically how many seconds the CPU has
              been in use and does not necessarily  directly  relate  to  the
              elapsed  time. Linux kernel keeps track of CPU seconds for each
              process independently.

       --rlimit-fsize=number
              Set the maximum file size that can be created by a process.

       --rlimit-nofile=number
              Set the maximum number  of  files  that  can  be  opened  by  a
              process.

       --rlimit-nproc=number
              Set the maximum number of processes that can be created for the
              real user ID of the calling process.

       --rlimit-sigpending=number
              Set the maximum number of pending signals for a process.

       --rmenv=name
              Remove environment variable in the new sandbox.

              Example:
              $ firejail --rmenv=DBUS_SESSION_BUS_ADDRESS

       --scan ARP-scan all the networks  from  inside  a  network  namespace.
              This  makes it possible to detect macvlan kernel device drivers
              running on the current host.

              Example:
              $ firejail --net=eth0 --scan

       --seccomp
              Enable seccomp filter and blacklist the syscalls in the default
              list (@default). The default list is as follows: _sysctl, acct,
              add_key, adjtimex, afs_syscall, bdflush,  bpf,  break,  chroot,
              clock_adjtime,   clock_settime,  create_module,  delete_module,
              fanotify_init, finit_module, ftime,  get_kernel_syms,  getpmsg,
              gtty, init_module, io_cancel, io_destroy, io_getevents, io_set‐
              up, io_submit, ioperm, iopl, ioprio_set, kcmp, kexec_file_load,
              kexec_load,  keyctl,  lock,  lookup_dcookie, mbind, mfsservctl,
              migrate_pages, modify_ldt, mount, move_pages, mpx, name_to_han‐
              dle_at,  open_by_handle_at,  pciconfig_iobase,  pciconfig_read,
              pciconfig_write,  perf_event_open,   personality,   pivot_root,
              process_vm_readv,  process_vm_writev,  process_vm_writev, prof,
              profil,     ptrace,     putpmsg,     query_module,      reboot,
              remap_file_pages,     request_key,     rtas,    s390_mmio_read,
              s390_mmio_write, s390_runtime_instr,  security,  set_mempolicy,
              setdomainname,  sethostname,  settimeofday, sgetmask, ssetmask,
              stime,  stty,  subpage_prot,  swapoff,  swapon,  switch_endian,
              sysfs,  syslog, tuxcall, ulimit, umount, umount2, uselib, user‐
              faultfd, ustat, vhangup, vm86, vm86old, vmsplice and vserver.

              To help creating useful seccomp filters more easily,  the  fol‐
              lowing  system call groups are defined: @clock, @cpu-emulation,
              @debug, @default, @default-nodebuggers, @default-keep, @module,
              @obsolete, @privileged, @raw-io, @reboot, @resources and @swap.
              In addtion, a system  call  can  be  specified  by  its  number
              instead  of  name  with  prefix $, so for example $165 would be
              equal to mount on i386.

              System architecture is strictly imposed  only  if  flag  --sec‐
              comp.block-secondary is used. The filter is applied at run time
              only if the correct architecture was detected. For the case  of
              I386 and AMD64 both 32-bit and 64-bit filters are installed.

              Firejail  will print seccomp violations to the audit log if the
              kernel was compiled with audit support (CONFIG_AUDIT flag).

              Example:
              $ firejail --seccomp

       --seccomp=syscall,@group
              Enable seccomp filter, blacklist the  default  list  (@default)
              and the syscalls or syscall groups specified by the command.

              Example:
              $ firejail --seccomp=utime,utimensat,utimes firefox
              $ firejail --seccomp=@clock,mkdir,unlinkat transmission-gtk

              Instead of dropping the syscall, a specific error number can be
              returned using syscall:errorno syntax.

              Example: $ firejail --seccomp=unlinkat:ENOENT,utimensat,utimes
              Parent pid 10662, child pid 10663
              Child process initialized
              $ touch testfile
              $ rm testfile
              rm: cannot remove `testfile': Operation not permitted

              If the blocked system calls  would  also  block  Firejail  from
              operating, they are handled by adding a preloaded library which
              performs seccomp system calls later.

              Example:
              $ firejail --noprofile --shell=none --seccomp=execve bash
              Parent pid 32751, child pid 32752
              Post-exec seccomp protector enabled
              list in: execve, check  list:  @default-keep  prelist:  (null),
              postlist: execve
              Child process initialized in 46.44 ms
              $ ls
              Bad system call

       --seccomp.block-secondary
              Enable  seccomp  filter and filter system call architectures so
              that only the native architecture is allowed. For  example,  on
              amd64,  i386 and x32 system calls are blocked as well as chang‐
              ing the execution domain with personality(2) system call.

       --seccomp.drop=syscall,@group
              Enable seccomp  filter,  and  blacklist  the  syscalls  or  the
              syscall groups specified by the command.

              Example:
              $ firejail --seccomp.drop=utime,utimensat,utimes,@clock

              Instead of dropping the syscall, a specific error number can be
              returned using syscall:errorno syntax.

              Example:
              $ firejail --seccomp.drop=unlinkat:ENOENT,utimensat,utimes
              Parent pid 10662, child pid 10663
              Child process initialized
              $ touch testfile
              $ rm testfile
              rm: cannot remove `testfile': Operation not permitted

       --seccomp.keep=syscall,syscall,syscall
              Enable seccomp filter, and whitelist the syscalls specified  by
              the  command.  The  system  calls  needed  by  Firejail  (group
              @default-keep: prctl, execve)  are  handled  with  the  preload
              library.

              Example:
              $ firejail --shell=none --seccomp.keep=poll,select,[...] trans‐
              mission-gtk

       --seccomp.print=name|pid
              Print the seccomp filter for the sandbox identified by name  or
              PID.

              Example:
              $ firejail --name=browser firefox &
              $ firejail --seccomp.print=browser
               line  OP JT JF    K
              =================================
               0000: 20 00 00 00000004   ld  data.architecture
               0001: 15 01 00 c000003e   jeq ARCH_64 0003 (false 0002)
               0002: 06 00 00 7fff0000   ret ALLOW
               0003: 20 00 00 00000000   ld  data.syscall-number
               0004: 35 01 00 40000000   jge X32_ABI true:0006 (false 0005)
               0005: 35 01 00 00000000   jge read 0007 (false 0006)
               0006: 06 00 00 00050001   ret ERRNO(1)
               0007: 15 41 00 0000009a   jeq modify_ldt 0049 (false 0008)
               0008: 15 40 00 000000d4   jeq lookup_dcookie 0049 (false 0009)
               0009:  15  3f  00  0000012a    jeq perf_event_open 0049 (false
              000a)
               000a: 15 3e 00 00000137   jeq  process_vm_writev  0049  (false
              000b)
               000b: 15 3d 00 0000009c   jeq _sysctl 0049 (false 000c)
               000c: 15 3c 00 000000b7   jeq afs_syscall 0049 (false 000d)
               000d: 15 3b 00 000000ae   jeq create_module 0049 (false 000e)
               000e:  15  3a  00  000000b1    jeq get_kernel_syms 0049 (false
              000f)
               000f: 15 39 00 000000b5   jeq getpmsg 0049 (false 0010)
               0010: 15 38 00 000000b6   jeq putpmsg 0049 (false 0011)
               0011: 15 37 00 000000b2   jeq query_module 0049 (false 0012)
               0012: 15 36 00 000000b9   jeq security 0049 (false 0013)
               0013: 15 35 00 0000008b   jeq sysfs 0049 (false 0014)
               0014: 15 34 00 000000b8   jeq tuxcall 0049 (false 0015)
               0015: 15 33 00 00000086   jeq uselib 0049 (false 0016)
               0016: 15 32 00 00000088   jeq ustat 0049 (false 0017)
               0017: 15 31 00 000000ec   jeq vserver 0049 (false 0018)
               0018: 15 30 00 0000009f   jeq adjtimex 0049 (false 0019)
               0019: 15 2f 00 00000131   jeq clock_adjtime 0049 (false 001a)
               001a: 15 2e 00 000000e3   jeq clock_settime 0049 (false 001b)
               001b: 15 2d 00 000000a4   jeq settimeofday 0049 (false 001c)
               001c: 15 2c 00 000000b0   jeq delete_module 0049 (false 001d)
               001d: 15 2b 00 00000139   jeq finit_module 0049 (false 001e)
               001e: 15 2a 00 000000af   jeq init_module 0049 (false 001f)
               001f: 15 29 00 000000ad   jeq ioperm 0049 (false 0020)
               0020: 15 28 00 000000ac   jeq iopl 0049 (false 0021)
               0021: 15 27 00 000000f6   jeq kexec_load 0049 (false 0022)
               0022: 15 26 00  00000140    jeq  kexec_file_load  0049  (false
              0023)
               0023: 15 25 00 000000a9   jeq reboot 0049 (false 0024)
               0024: 15 24 00 000000a7   jeq swapon 0049 (false 0025)
               0025: 15 23 00 000000a8   jeq swapoff 0049 (false 0026)
               0026: 15 22 00 000000a3   jeq acct 0049 (false 0027)
               0027: 15 21 00 00000141   jeq bpf 0049 (false 0028)
               0028: 15 20 00 000000a1   jeq chroot 0049 (false 0029)
               0029: 15 1f 00 000000a5   jeq mount 0049 (false 002a)
               002a: 15 1e 00 000000b4   jeq nfsservctl 0049 (false 002b)
               002b: 15 1d 00 0000009b   jeq pivot_root 0049 (false 002c)
               002c: 15 1c 00 000000ab   jeq setdomainname 0049 (false 002d)
               002d: 15 1b 00 000000aa   jeq sethostname 0049 (false 002e)
               002e: 15 1a 00 000000a6   jeq umount2 0049 (false 002f)
               002f: 15 19 00 00000099   jeq vhangup 0049 (false 0030)
               0030: 15 18 00 000000ee   jeq set_mempolicy 0049 (false 0031)
               0031: 15 17 00 00000100   jeq migrate_pages 0049 (false 0032)
               0032: 15 16 00 00000117   jeq move_pages 0049 (false 0033)
               0033: 15 15 00 000000ed   jeq mbind 0049 (false 0034)
               0034:  15  14  00 00000130   jeq open_by_handle_at 0049 (false
              0035)
               0035: 15 13 00 0000012f   jeq  name_to_handle_at  0049  (false
              0036)
               0036: 15 12 00 000000fb   jeq ioprio_set 0049 (false 0037)
               0037: 15 11 00 00000067   jeq syslog 0049 (false 0038)
               0038: 15 10 00 0000012c   jeq fanotify_init 0049 (false 0039)
               0039: 15 0f 00 00000138   jeq kcmp 0049 (false 003a)
               003a: 15 0e 00 000000f8   jeq add_key 0049 (false 003b)
               003b: 15 0d 00 000000f9   jeq request_key 0049 (false 003c)
               003c: 15 0c 00 000000fa   jeq keyctl 0049 (false 003d)
               003d: 15 0b 00 000000ce   jeq io_setup 0049 (false 003e)
               003e: 15 0a 00 000000cf   jeq io_destroy 0049 (false 003f)
               003f: 15 09 00 000000d0   jeq io_getevents 0049 (false 0040)
               0040: 15 08 00 000000d1   jeq io_submit 0049 (false 0041)
               0041: 15 07 00 000000d2   jeq io_cancel 0049 (false 0042)
               0042:  15  06  00  000000d8   jeq remap_file_pages 0049 (false
              0043)
               0043: 15 05 00 00000116   jeq vmsplice 0049 (false 0044)
               0044: 15 04 00 00000087   jeq personality 0049 (false 0045)
               0045: 15 03 00 00000143   jeq userfaultfd 0049 (false 0046)
               0046: 15 02 00 00000065   jeq ptrace 0049 (false 0047)
               0047: 15 01 00 00000136    jeq  process_vm_readv  0049  (false
              0048)
               0048: 06 00 00 7fff0000   ret ALLOW
               0049: 06 00 01 00000000   ret KILL
              $

       --shell=none
              Run the program directly, without a user shell.

              Example:
              $ firejail --shell=none script.sh

       --shell=program
              Set  default  user shell. Use this shell to run the application
              using -c shell option.  For example "firejail --shell=/bin/dash
              firefox"  will start Mozilla Firefox as "/bin/dash -c firefox".
              By default Bash shell (/bin/bash) is used.

              Example: $firejail --shell=/bin/dash script.sh

       --shutdown=name|pid
              Shutdown the sandbox identified by name or PID.

              Example:
              $ firejail --name=mygame --caps.drop=all warzone2100 &
              $ firejail --shutdown=mygame

              Example:
              $ firejail --list
              3272:netblue::firejail --private firefox
              $ firejail --shutdown=3272

       --timeout=hh:mm:ss
              Kill the sandbox automatically after the time has elapsed.  The
              time is specified in hours/minutes/seconds format.

              $ firejail --timeout=01:30:00 firefox

       --tmpfs=dirname
              Mount  a  tmpfs filesystem on directory dirname. This option is
              available only when running the sandbox as root.  File globbing
              is supported, see FILE GLOBBING section for more details.

              Example:
              # firejail --tmpfs=/var

       --top  Monitor  the  most CPU-intensive sandboxes, see MONITORING sec‐
              tion for more details.

              Example:
              $ firejail --top

       --trace
              Trace open, access and connect system calls.

              Example:
              $ firejail --trace wget -q www.debian.org
              Reading profile /etc/firejail/wget.profile
              3:wget:fopen64 /etc/wgetrc:0x5c8e8ce6c0
              3:wget:fopen /etc/hosts:0x5c8e8cfb70
              3:wget:socket AF_INET SOCK_DGRAM IPPROTO_IP:3
              3:wget:connect 3 8.8.8.8 port 53:0
              3:wget:socket AF_INET SOCK_STREAM IPPROTO_IP:3
              3:wget:connect 3 130.89.148.14 port 80:0
              3:wget:fopen64 index.html:0x5c8e8d1a60

              parent is shutting down, bye...

       --tracelog
              This option enables auditing blacklisted files and directories.
              A  message  is sent to syslog in case the file or the directory
              is accessed.

              Example:
              $ firejail --tracelog firefox

              Sample messages:
              $ sudo tail -f /var/log/syslog
              [...]
              Dec  3 11:43:25  debian  firejail[70]:  blacklist  violation  -
              sandbox 26370, exe firefox, syscall open64, path /etc/shadow
              Dec   3  11:46:17  debian  firejail[70]:  blacklist violation -
              sandbox 26370, exe firefox, syscall opendir, path /boot
              [...]

       --tree Print a tree of all sandboxed processes, see MONITORING section
              for more details.

              Example:
              $ firejail --tree
              11903:netblue:firejail iceweasel
                11904:netblue:iceweasel
                  11957:netblue:/usr/lib/iceweasel/plugin-container
              11969:netblue:firejail --net=eth0 transmission-gtk
                11970:netblue:transmission-gtk

       --tunnel[=devname]
              Connect  the sandbox to a network overlay/VPN tunnel created by
              firetunnel utility. This options tries first the client side of
              the  tunnel. If this fails, it tries the server side. If multi‐
              ple tunnels are active, please specify the tunnel device  using
              --tunnel=devname.

              The  available  tunnel  devices  are  listed in /etc/firetunnel
              directory, one file for each device.   The  files  are  regular
              firejail  profile  files  containing the network configuration,
              and are created and managed by firetunnel utility.  By  default
              ftc  is  the  client-side  device  and  fts  is the server-side
              device. For more information please see man 1 firetunnel.

              Example:
              $ firejail --tunnel firefox

       --version
              Print program version and exit.

              Example:
              $ firejail --version
              firejail version 0.9.27

       --veth-name=name
              Use this name for the interface connected  to  the  bridge  for
              --net=bridge_interface commands, instead of the default one.

              Example:
              $ firejail --net=br0 --veth-name=if0

       --whitelist=dirname_or_filename
              Whitelist directory or file. A temporary file system is mounted
              on the top directory, and  the  whitelisted  files  are  mount-
              binded  inside.  Modifications to whitelisted files are persis‐
              tent, everything else is discarded when the sandbox is  closed.
              The top directory could be user home, /dev, /etc, /media, /mnt,
              /opt, /srv, /sys/module, /usr/share, /var, and /tmp.

              Symbolic link handling: with the exception of user  home,  both
              the link and the real file should be in the same top directory.
              For user home, both the link and the real file should be  owned
              by the user.

              Example:
              $ firejail --noprofile --whitelist=~/.mozilla
              $ firejail --whitelist=/tmp/.X11-unix --whitelist=/dev/null
              $ firejail "--whitelist=/home/username/My Virtual Machines"

       --writable-etc
              Mount /etc directory read-write.

              Example:
              $ sudo firejail --writable-etc

       --writable-run-user
              Disable  the default blacklisting of /run/user/$UID/systemd and
              /run/user/$UID/gnupg.

              Example:
              $ sudo firejail --writable-run-user

       --writable-var
              Mount /var directory read-write.

              Example:
              $ sudo firejail --writable-var

       --writable-var-log
              Use the real /var/log directory, not a  clone.  By  default,  a
              tmpfs  is  mounted on top of /var/log directory, and a skeleton
              filesystem is created based on the original /var/log.

              Example:
              $ sudo firejail --writable-var-log

       --x11  Sandbox the application using Xpra, Xephyr, Xvfb or Xorg  secu‐
              rity  extension.  The sandbox will prevents screenshot and key‐
              logger applications started inside the sandbox  from  accessing
              clients  running  outside the sandbox.  Firejail will try first
              Xpra, and if Xpra is not installed on the system, it  will  try
              to find Xephyr.  If all fails, Firejail will not attempt to use
              Xvfb or X11 security extension.

              Xpra, Xephyr and Xvfb modes require a network namespace  to  be
              instantiated  in  order to disable X11 abstract Unix socket. If
              this is not possible, the user can disable the abstract  socket
              by  adding  "-nolisten  local"  on  Xorg command line at system
              level.

              Example:
              $ firejail --x11 --net=eth0 firefox

       --x11=none
              Blacklist /tmp/.X11-unix directory, ${HOME}/.Xauthority and the
              file  specified  in ${XAUTHORITY} environment variable.  Remove
              DISPLAY and XAUTHORITY environment variables.  Stop with  error
              message if X11 abstract socket will be accessible in jail.

       --x11=xephyr
              Start  Xephyr and attach the sandbox to this server.  Xephyr is
              a display server implementing the X11 display server  protocol.
              A  network  namespace needs to be instantiated in order to deny
              access to X11 abstract Unix domain socket.

              Xephyr runs in a window just like any  other  X11  application.
              The  default  window  size is 800x600.  This can be modified in
              /etc/firejail/firejail.config file.

              The recommended way to use this feature is to run a window man‐
              ager  inside  the  sandbox.   A security profile for OpenBox is
              provided.

              Xephyr is developed by Xorg project. On Debian platforms it  is
              installed with the command sudo apt-get install xserver-xephyr.
              This feature is not available when running as root.

              Example:
              $ firejail --x11=xephyr --net=eth0 openbox

       --x11=xorg
              Sandbox the application using the untrusted mode implemented by
              X11  security  extension.   The  extension is available in Xorg
              package and it is installed by default on most Linux  distribu‐
              tions.  It provides support for a simple trusted/untrusted con‐
              nection model. Untrusted clients are restricted in certain ways
              to  prevent them from reading window contents of other clients,
              stealing input events, etc.

              The untrusted mode has several limitations. A  lot  of  regular
              programs   assume they are a trusted X11 clients and will crash
              or lock up when run in untrusted  mode.  Chromium  browser  and
              xterm  are  two examples.  Firefox and transmission-gtk seem to
              be working fine.  A network namespace is not required for  this
              option.

              Example:
              $ firejail --x11=xorg firefox

       --x11=xpra
              Start  Xpra  (https://xpra.org)  and attach the sandbox to this
              server.  Xpra is a persistent remote display server and  client
              for forwarding X11 applications and desktop screens.  A network
              namespace needs to be instantiated in order to deny  access  to
              X11 abstract Unix domain socket.

              On  Debian  platforms  Xpra  is installed with the command sudo
              apt-get install xpra.  This feature is not available when  run‐
              ning as root.

              Example:
              $ firejail --x11=xpra --net=eth0 firefox

       --x11=xvfb
              Start  Xvfb  X11  server and attach the sandbox to this server.
              Xvfb, short for X virtual framebuffer, performs  all  graphical
              operations in memory without showing any screen output. Xvfb is
              mainly used for remote access and software testing on  headless
              servers.

              On  Debian  platforms  Xvfb  is installed with the command sudo
              apt-get install xvfb.  This feature is not available when  run‐
              ning as root.

              Example: remote VNC access

              On  the server we start a sandbox using Xvfb and openbox window
              manager. The default size of Xvfb screen is 800x600 - it can be
              changed  in  /etc/firejail/firejail.config  (xvfb-screen). Some
              sort of networking (--net) is required in order to isolate  the
              abstract sockets used by other X servers.

              $ firejail --net=none --x11=xvfb openbox

              *** Attaching to Xvfb display 792 ***

              Reading profile /etc/firejail/openbox.profile
              Reading profile /etc/firejail/disable-common.inc
              Reading profile /etc/firejail/disable-common.local
              Parent pid 5400, child pid 5401

              On  the  server we also start a VNC server and attach it to the
              display handled by our Xvfb server (792).

              $ x11vnc -display :792

              On the client machine we start a VNC viewer and use it to  con‐
              nect to our server:

              $ vncviewer

       --xephyr-screen=WIDTHxHEIGHT
              Set  screen  size  for --x11=xephyr. The setting will overwrite
              the default set in /etc/firejail/firejail.config for  the  cur‐
              rent sandbox. Run xrandr to get a list of supported resolutions
              on your computer.

              Example:
              $  firejail  --net=eth0  --x11=xephyr   --xephyr-screen=640x480
              firefox

DESKTOP INTEGRATION
       A symbolic link to /usr/bin/firejail under the name of a program, will
       start the program in Firejail sandbox.  The symbolic  link  should  be
       placed  in  the first $PATH position. On most systems, a good place is
       /usr/local/bin directory. Example:

              Make a firefox symlink to /usr/bin/firejail:

              $ ln -s /usr/bin/firejail /usr/local/bin/firefox

              Verify $PATH

              $ which -a firefox
              /usr/local/bin/firefox
              /usr/bin/firefox

              Starting firefox in this moment, automatically  invokes  “fire‐
              jail firefox”.

       This  works  for clicking on desktop environment icons, menus etc. Use
       "firejail --tree" to verify the program is sandboxed.

              $ firejail --tree
              1189:netblue:firejail firefox
                1190:netblue:firejail firefox
                  1220:netblue:/bin/sh -c "/usr/lib/firefox/firefox"
                    1221:netblue:/usr/lib/firefox/firefox

       We provide a tool that automates all this integration, please see  man
       1 firecfg for more details.

FILE GLOBBING
       Globbing  is  the  operation  that expands a wildcard pattern into the
       list of pathnames matching the pattern. Matching is defined by:

              - '?' matches any character
              - '*' matches any string
              - '[' denotes a range of characters

       The gobing feature is implemented using glibc glob command.  For  more
       information on the wildcard syntax see man 7 glob.

       The  following command line options are supported: --blacklist, --pri‐
       vate-bin, --noexec, --read-only, --read-write, and --tmpfs.

       Examples:

              $ firejail --private-bin=sh,bash,python*
              $ firejail --blacklist=~/dir[1234]
              $ firejail --read-only=~/dir[1-4]

APPARMOR
       AppArmor support is disabled by default at compile time. Use --enable-
       apparmor configuration option to enable it:

              $ ./configure --prefix=/usr --enable-apparmor

       During  software  install,  a generic AppArmor profile file, firejail-
       default, is placed in /etc/apparmor.d directory. The profile needs  to
       be loaded into the kernel by running the following command as root:

              # aa-enforce firejail-default

       The  installed  profile tries to replicate some advanced security fea‐
       tures inspired by kernel-based Grsecurity:

              - Prevent information leakage in /proc  and  /sys  directories.
              The  resulting filesystem is barely enough for running commands
              such as "top" and "ps aux".

              - Allow running programs only  from  well-known  system  paths,
              such as /bin, /sbin, /usr/bin etc. Running programs and scripts
              from user home or other directories writable by the user is not
              allowed.

              - Allow access to files only in the following standard directo‐
              ries: /bin, /dev,  /etc,  /home,  /lib*,  /media,  /mnt,  /opt,
              /proc, /root, /run, /sbin, /srv, /sys, /tmp, /usr, and /var

              -  Disable D-Bus. D-Bus has long been a huge security hole, and
              most programs don't use it anyway.  You should have no problems
              running  Chromium or Firefox. This feature is available only on
              Ubuntu kernels.

       To enable AppArmor confinement on top of your current  Firejail  secu‐
       rity  features, pass --apparmor flag to Firejail command line. You can
       also include apparmor command in a Firejail profile file. Example:

              $ firejail --apparmor firefox

FILE TRANSFER
       These features allow the user to inspect the filesystem  container  of
       an  existing sandbox and transfer files from the container to the host
       filesystem.

       --get=name|pid filename
              Retrieve the container file and store it on  the  host  in  the
              current  working directory.  The container is specified by name
              or PID.

       --ls=name|pid dir_or_filename
              List container files. The container is  specified  by  name  or
              PID.

       --put=name|pid src-filename dest-filename
              Put src-filename in sandbox container.  The container is speci‐
              fied by name or PID.

       Examples:

              $ firejail --name=mybrowser --private firefox

              $ firejail --ls=mybrowser ~/Downloads
              drwxr-xr-x netblue  netblue         4096 .
              drwxr-xr-x netblue  netblue         4096 ..
              -rw-r--r-- netblue  netblue         7847 x11-x305.png
              -rw-r--r-- netblue  netblue         6800 x11-x642.png
              -rw-r--r-- netblue  netblue        34139 xpra-clipboard.png

              $ firejail --get=mybrowser ~/Downloads/xpra-clipboard.png

              $ firejail --put=mybrowser xpra-clipboard.png ~/Downloads/xpra-
              clipboard.png

TRAFFIC SHAPING
       Network  bandwidth is an expensive resource shared among all sandboxes
       running on a system.  Traffic shaping allows the user to increase net‐
       work performance by controlling the amount of data that flows into and
       out of the sandboxes.

       Firejail implements a simple rate-limiting shaper based on Linux  com‐
       mand  tc.  The shaper works at sandbox level, and can be used only for
       sandboxes configured with new network namespaces.

       Set rate-limits:

            $ firejail --bandwidth=name|pid set network download upload

       Clear rate-limits:

            $ firejail --bandwidth=name|pid clear network

       Status:

            $ firejail --bandwidth=name|pid status

       where:
            name - sandbox name
            pid - sandbox pid
            network - network interface as used by --net option
            download - download speed in KB/s (kilobyte per second)
            upload - upload speed in KB/s (kilobyte per second)

       Example:
            $ firejail --name=mybrowser --net=eth0 firefox &
            $ firejail --bandwidth=mybrowser set eth0 80 20
            $ firejail --bandwidth=mybrowser status
            $ firejail --bandwidth=mybrowser clear eth0

AUDIT
       Audit feature allows the user to point out gaps in security  profiles.
       The  implementation  replaces  the program to be sandboxed with a test
       program. By default, we use faudit program distributed with  Firejail.
       A custom test program can also be supplied by the user. Examples:

       Running the default audit program:
            $ firejail --audit transmission-gtk

       Running a custom audit program:
            $ firejail --audit=~/sandbox-test transmission-gtk

       In the examples above, the sandbox configures transmission-gtk profile
       and starts the test program. The real program, transmission-gtk,  will
       not be started.

       Limitations: audit feature is not implemented for --x11 commands.

MONITORING
       Option  --list  prints  a  list  of all sandboxes. The format for each
       process entry is as follows:

            PID:USER:Sandbox Name:Command

       Option --tree prints the tree of processes running in the sandbox. The
       format for each process entry is as follows:

            PID:USER:Sandbox Name:Command

       Option  --top  is  similar to the UNIX top command, however it applies
       only to sandboxes.

       Option --netstats  prints  network  statistics  for  active  sandboxes
       installing new network namespaces.

       Listed  below are the available fields (columns) in alphabetical order
       for --top and --netstat options:

       Command
              Command used to start the sandbox.

       CPU%   CPU usage, the sandbox share of the elapsed CPU time since  the
              last screen update

       PID    Unique process ID for the task controlling the sandbox.

       Prcs   Number  of processes running in sandbox, including the control‐
              ling process.

       RES    Resident Memory Size (KiB), sandbox non-swapped  physical  mem‐
              ory.   It  is a sum of the RES values for all processes running
              in the sandbox.

       RX(KB/s)
              Network receive speed.

       Sandbox Name
              The name of the sandbox, if any.

       SHR    Shared Memory Size (KiB), it reflects memory shared with  other
              processes. It is a sum of the SHR values for all processes run‐
              ning in the sandbox, including the controlling process.

       TX(KB/s)
              Network transmit speed.

       Uptime Sandbox running time in hours:minutes:seconds format.

       USER   The owner of the sandbox.

SECURITY PROFILES
       Several command line options can be passed to the program  using  pro‐
       file files. Firejail chooses the profile file as follows:

       1.  If  a  profile file is provided by the user with --profile option,
       the profile file is loaded.  Example:

              $ firejail --profile=/home/netblue/icecat.profile icecat
              Reading profile /home/netblue/icecat.profile
              [...]

       2. If a profile file with the same name as the application is  present
       in  ~/.config/firejail  directory  or in /etc/firejail, the profile is
       loaded. ~/.config/firejail takes precedence over /etc/firejail.  Exam‐
       ple:

              $ firejail icecat
              Command name #icecat#
              Found  icecat  profile in /home/netblue/.config/firejail direc‐
              tory
              Reading profile /home/netblue/.config/firejail/icecat.profile
              [...]

       3. Use default.profile file if the sandbox is  started  by  a  regular
       user,  or server.profile file if the sandbox is started by root. Fire‐
       jail looks for these files in ~/.config/firejail  directory,  followed
       by  /etc/firejail  directory.  To disable default profile loading, use
       --noprofile command option. Example:

              $ firejail
              Reading profile /etc/firejail/default.profile
              Parent pid 8553, child pid 8554
              Child process initialized
              [...]

              $ firejail --noprofile
              Parent pid 8553, child pid 8554
              Child process initialized
              [...]

       See man 5 firejail-profile for profile file syntax information.

RESTRICTED SHELL
       To configure a restricted shell, replace /bin/bash with /usr/bin/fire‐
       jail  in  /etc/passwd  file for each user that needs to be restricted.
       Alternatively, you can specify /usr/bin/firejail  in adduser command:

       adduser --shell /usr/bin/firejail username

       Additional arguments passed to  firejail  executable  upon  login  are
       declared in /etc/firejail/login.users file.

EXAMPLES
       firejail
              Sandbox a regular /bin/bash session.

       firejail firefox
              Start Mozilla Firefox.

       firejail --debug firefox
              Debug Firefox sandbox.

       firejail --private firefox
              Start Firefox with a new, empty home directory.

       firejail --net=none vlc
              Start VLC in an unconnected network namespace.

       firejail --net=eth0 firefox
              Start  Firefox  in  a  new  network namespace. An IP address is
              assigned automatically.

       firejail --net=br0 --ip=10.10.20.5 --net=br1 --net=br2
              Start a /bin/bash session in a new network namespace  and  con‐
              nect  it to br0, br1, and br2 host bridge devices. IP addresses
              are assigned automatically for the interfaces connected to  br1
              and b2

       firejail --list
              List all sandboxed processes.

LICENSE
       This  program  is free software; you can redistribute it and/or modify
       it under the terms of the GNU General Public License as  published  by
       the  Free Software Foundation; either version 2 of the License, or (at
       your option) any later version.

       Homepage: https://firejail.wordpress.com

SEE ALSO
       firemon(1), firecfg(1), firejail-profile(5),  firejail-login(5)  fire‐
       jail-users(5)

0.9.56                             Sep 2018                       FIREJAIL(1)

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34 thoughts on “man firejail

  1. Chiraag

    I’m having some difficulty in getting mpd to background properly inside firejail. Using “mpd; sleep inf;” worked before, but it’s now responding with “mpd; sleep inf;: command not found”. What is the “official” way to get this working again? Thanks!

    Like

    Reply
  2. GNUser

    nosound option is breaking profiles.
    I tried it in icedove, piding, firefox, and it breaks all of them. if i try to use a profile that has that option it just gives an error in that line. If I do it like “firejail –nosound firefox” however it works flawlessly. I am using 0.9.38

    Any idea?

    Like

    Reply
      1. GNUser

        I expected it to just prevent that specific application from using sound. It is very “anti-feature” this way, since to prevent one application from being exploited and used to spy, we lose sound in all the other apps. Any workaround?

        Like

  3. procoolheat

    When I installed this for use with Chrome it created a profile somewhere for Chrome so it starts with a loaded Chrome cache and some features enabled on Chrome extensions. So I clear the cache and change the extension settings every time I use it firejail google-chrome is how I start it. I’ve even removed it and reinstalled it but the profile is always the same. This is the latest version also. How do I go about deleting this? It’s acting like its in private mode which I thought was deprecated, Help!

    Like

    Reply
    1. netblue30 Post author

      google-chrome configuration is persistent, and is stored in ~/.config/google-chrome directory. So, if you add a bookmark, next time you start chrome, your bookmark should be there. You can delete the configuration before starting chrome (rm -fr ~/.config/google-chrome). Your Download directory is also persistent.

      If you really want to start every time with a default chrome config, you should run “firejail –private google-chrome”.

      Liked by 1 person

      Reply
  4. Martin

    [quote]
    This works for clicking on desktop environment icons, menus etc. Use
    “firejail –tree” to verify the program is sandboxed.
    [/quote]

    Sadly it’s not working for most applications in Gnome3 in Debian Stretch. Probably because in the *.desktop files there is the full path written.
    Do you know a workaround or you suggest to file a bugreport?

    Like

    Reply
  5. kdemeoz

    Hi. Many thanks for FireJail – it’s an amazing achievement.

    Is there a way for FireJail to sandbox internet-facing programs, whose user-data & config files are NOT stored as conventional in /home, but instead are in separate partition /DATA [albeit symlinked back to /home] ? So far all my tests with combinations of –blacklist & –noblacklist in their launchers [for eg, Thunderbird & Firefox] have failed [& –whitelist can’t be used at all if i understand correctly, given their active directories are not in /home], in that either the programs can’t launch at all [because can’t access their config & data], or they launch but ALL other directories & files in /DATA are exposed to internet. Please?

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    Reply
      1. kdemeoz

        That’s the unfortunate conclusion i’d come to, but given i am still not very skilled with FJ, i felt it best to ask you. Thank you.

        Like

  6. Pingback: Sandbox your applications with Firejail – Own your bits

  7. Matthew

    Trying to use –private-home with Google Chrome default profile. I am trying to preserve the add-ons and plug-ins from my default Chrome profile. I’ve tried many iterations, including [firejail –private-home=~/.google-chrome/Default google-chrome-stable]

    But Chrome just fails to load when I double-click on it in Firetools.

    I have tried using many directory path options, but to no avail. Someone please help.

    Like

    Reply
    1. netblue30 Post author

      Use –private only if you need a browser reseted to factory defaults, without any plugins and addons.

      By default Firejail will allow you to use all Chrome addons and plugins. The only directories exposed in your home are Downloads and Chrome configuration files.

      I would say just start it as “firejail chrome” and you should be ok. We do this for all browsers.

      Like

      Reply
  8. Matthew

    netblue,

    Thx for the info. Much appreciated. As I have been looking into optimizing the security features of Firejail and found out that –seccomp, –overlay and –overlay-tmpfs do not work with Chrome, I have managed to come up with the following (not sure if I’ve missed anything):

    firejail –caps.drop=all –noroot –allow-private-blacklist –blacklist=/Home/ –read-only=~ google-chrome-stable

    Chrome loads no problem and at least I’ve added some additional security features to further tighten the security of the sandbox.

    I’m currently running Fedora v26 and as it relates to all the command-line parameters that add additional measures of security, It has taken a while to figure out what works with Chrome and what doesn’t.

    That being said, and as others have mentioned previously, thank you for all your hard work (and anyone else who worked on Firejail/Firetools).

    Cheers.

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  9. Matthew

    Oops. I apologize for not mentioning this in my response above. My main purpose for implementing Firejail / Firetools is solely to improve upon the overall security of internet browsing sessions. I’m not testing software or writing code. This is just to help prevent virus / malware injection. Thanks again!

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    1. netblue30 Post author

      Question: why don’t you use the default profile for Chrome distributed by firejail?

      You’ll find it in /etc/firejail/google-*.,profile. We have profiles for all Chrome variants, including Chromium. All of them are basically the same, with very small differences. Some of features such as seccomp won’t work for Chrome browser because Chrom starts a second sandbox inside firejail sandbox.

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  10. Matthew

    Indeed sir.

    I found the /etc/firejail/google*.profile files and performed the steps (as you outlined in the profiles section here on the site) to save a new google-chrome-stable profile in my [/home/.config/firejail] directory and add the nonewprivs and noroot parameters. I also rem’ed out the caps.keep sys_chroot, sys_admin line and added caps.drop all. Now all I have to do is ‘firejail google-chrome-stable.’ I (again) apologize as I don’t really know if the chroot and admin capabilities are needed in Chrome for pure internet browsing. I conducted some on-line research on those capabilities, but couldn’t come up with anything definitive. As you can see, my working knowledge of Linux is not yet up to snuff.

    NetBlue, again my sincere thanks for an awesome program.

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  11. Pingback: Sandbox your applications with Firejail – Linux Now

  12. Pingback: Using Firejail to sandbox applications in Linux – Excerpts of the Regginator

  13. Ben

    Hi

    You’ve made a great tool here, and I’m grateful.

    However, I am finding it hard to use. Partly that’s because I am learning about computer science as I go. I’m a noob.

    But partly I am having trouble with the documentation. I find it dense, counter-intuititve and overwhelming. I’m not talking about the content (well, sometimes). Its the structure.

    Case in point: I want to read up how to transfer a file out of sandbox into my host system’s Documents folder. This page has three places at least where “FILE TRANSFER” is located, and I have two options to find them: scrolling, a long way, or; crtl+F in my browser.

    Why don’t those entries link to each other? Or any, between other parts of the page or site.

    FILE TRANSFERS (your caps) is part of a large series of section titles, to which there is no link between them nor a table of contents.

    There isn’t even an anchor so I can bookmark the spot once I’ve found it. [Add in extra time looking fruitlessly for browser extensions that might help].

    Please remember that if you aren’t a commandline guru, you’ve committed to Linux years ago but you’re still figuring out what the hell namespaces are, you don’t have the tacit knowledge that might help you sail through this space. Its called tacit knowledge – enormously valuable, years in the making and possession of it is easily forgotten even by those who have it. I don’t have it.

    You’re basically asking me to trawl through a page of gobbledygook (technical term) for something I don’t really understand, and even forget how to spell between ctrl+Fs.

    Basic structure would give me so much more working memory to the substantive task (i.e. file transfer) rather than document navigation.

    What kills me is that I remember having figured this out six months ago, but I’ve got to do it all over again… I’ve already lost a couple of hours that I don’t have.

    This is a great tool. Can you make it more accessible? I am sure its not just me, but I’m pretty vocal (most else just slink away quietly and frustrated).

    (To put money where my mouth is, I would have time in about 6 weeks to help. I’d have to learn a few things, but I’d be willing).

    Constructively,

    B.

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  14. Ben

    Furthermore, I just flat out can’t get the transfer to work.

    First, I do this:

    11:31:25 b:~ $ firemon –list
    3799:b:/usr/bin/firejail /usr/bin/keepass2 /xxxxxxxxxxxxxxx
    3821:b:/usr/bin/firejail /usr/bin/firefox
    4632:b:/usr/bin/firejail /usr/bin/VirtualBox
    13497:b:/usr/bin/firejail /usr/bin/google-chrome-stable
    20129:b:firejail –private firefox –private-window –no-remote –no-first-run
    22100:b:/usr/bin/firejail /usr/bin/pluma /home/b/xxxxxxxxxxxxxx

    (edit – multiple x added by me)

    I haven’t named my private firefox session (second from bottom) – I haven’t a clue as to how, and I got lost looking for instructions last time. I start the thing from a desktop launcher for banking, government websites, etc.

    But, the instructions say PID can be used, so

    11:33:36 b:~ $ sudo firejail –ls=20129 ~/Downloads
    drwx—— b b 60 .
    drwx—— b b 220 ..
    -rw-rw-r– b b 13058 Target Document

    So, I want ‘Target Document’.

    11:34:07 b:~ $ firejail –get=20129 ~/Downloads/’Target Document’
    Warning: cannot open source file /home/b/Downloads/Target Document, file not copied

    “WTF…?” I mutter to myself. I recheck instructions. Nope…

    The all-powerful sudo?

    15:32:36 b:~ $ sudo firejail –get=20129 ~/Downloads/’Target Document’
    Warning: cannot open source file /home/b/Downloads/Centrelink Statement, file not copied

    Nope. It took me quite a while before I realised the permissions were probably at the heart of it. However, I can’t figure out how to get into that sandbox to modify permissions, and anyway – why should I, as a user on the host (and as sudo, no less), have to modify rights to copy a file I downloaded? I don’t understand the constraints, but seems weird. (If an attacker is issuing commands from the host terminal, the game is over already, surely?)

    I tried a couple of other tacks

    15:43:07 b:~ $ firejail –chmod=20129 777 ~/Downloads
    Error: invalid –chmod=20129 command line option
    15:44:49 b:~ $ $ firejail –whitelist=~/.mozilla –whitelist=~/Download firefox
    $: command not found

    and even tried the whole command listed in the –ls output as the `name`, but it didn’t work. Read the whole Firefox entry and couldn’t see the solution. Don’t know where to look, and note that a search engine brings up others with transfer problems, but I can’t devine enough to apply fixes to my situation.

    I am absolutely stumped. Please help.

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  15. Josh

    I’m writing “./configure –prefix=/usr –enable-apparmor” into the terminal and it’s telling me the file or category can’t be found. Firejail is 100% installed. Am I doing something wrong? 😦

    Linux Mint 19 XFCE.

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